Circle chord

What is the length x of the chord circle of diameter 115 m, if the distance from the center circle is 11 m?

Correct result:

x =  112.876 m


D=115 m t=11 m  r=D/2=115/2=1152=57.5 m   (x/2)2+t2=r2  (x/2)2=r2t2  x=2 r2t2=2 57.52112=12741=112.876 m

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